Abstract
The existence of Atangana-Baleanu fractional-order semilinear integro-differential systems and semilinear neutral integro-di fferential systems with state-dependent delay in Banach spaces is investigated in this paper. We establish the existence findings by using Monch's fixed point theorem and the concept of measures of non-compactness. A functioning example is provided at the end in order to illustrate the findings reached from the theoretical study.